import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'
Vue.use(VueRouter)
const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: GoodsList },
      { path: '/goods/add', component: Add },
      { path: '/orders', component: Order },
      { path: '/reports', component: Report }
    ]
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})
// 挂载路由导航守卫  限制用户登录限制的路由  to 是要跳转的页面 from是从哪个页面跳转过来的 next 是放行
router.beforeEach((to, from, next) => {
  // to将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数 表示放行
  // next两种放行方式 next()  next('/login')强制要跳转的路径
  if (to.path === '/login') return next()
  // 如果用户访问限制路径 先判断token 是否存在
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login') // 没有登录 强制跳转到登录页面
  next() // 登录了 跳转到限制页面
})
export default router
